cvs commit: src/sys/amd64/amd64 db_trace.c exception.S machdep.c trap.c

[John Baldwin]

On Thursday 15 November 2007 05:32:39 pm Kris Kennaway wrote:
> John Baldwin wrote:
> > On Thursday 15 November 2007 05:00:57 pm John Baldwin wrote:
> >> jhb         2007-11-15 22:00:57 UTC
> >>
> >>   FreeBSD src repository
> >>
> >>   Modified files:
> >>     sys/amd64/amd64      db_trace.c exception.S machdep.c trap.c 
> >>   Log:
> >>   Add support for cross double fault frames in stack traces:
> >>   - Populate the register values for the trapframe put on the stack by 
the
> >>     double fault handler.
> >>   - Teach DDB's trace routine to treat a double fault like other trap 
> > frames.
> >>   
> >>   MFC after:      3 days
> > 
> > As an aside, because amd64 uses much saner stack frames than i386, kgdb 
will 
> > trace across a double fault just fine w/o any further patches if the 
kernel 
> > has this fix.
> > 
> 
> Nice.

I'm working on fixing kgdb on i386 to cross double faults as well.  It's a 
good bit nastier as I have to do evil things to find the tss for the CPU and 
read the registers out of that, but I hope to test it tomorrow.

-- 
John Baldwin